One of Tesla's largest shareholders is urging Elon Musk to simmer down and focus after a tumultuous few weeks

James Anderson, a partner and portfolio manager at the asset-management firm, alluded to the turmoil surrounding the Tesla CEO, including his public rants in recent weeks, in an interview with Bloomberg on Wednesday.

Musk has targeted reporters and news outlets over troubling news about Tesla's Model 3 production and internal struggles at the company. Those rants have prompted some fallout.

Anderson told Bloomberg that Baillie Gifford still supported Musk "but would like peace and execution at this stage."

Tesla has either missed or postponed Model 3 production goals since the company started building its newest car late last year.

One of Tesla's most influential shareholders is giving Elon Musk an earful about the turmoil surrounding him and the electric-car maker in recent weeks.

James Anderson, a partner and portfolio manager at the asset-management firm Baillie Gifford, alluded to the turmoil surrounding Musk, including the CEO's recent public rants, in an interview with Bloomberg on Wednesday.

Anderson offered some muted criticism of Musk in the Bloomberg interview.

"We are very supportive, but we would like peace and execution at this stage," Anderson said. "It would be good to just concentrate on the core task."

Baillie Gifford held 12.8 million shares of Tesla at the end of the first quarter, which would be worth a little more than $4 billion at Wednesday's closing price of $318.96. It's Tesla's fourth-largest shareholder.

The hand-wringing comes as the saga around Tesla Model 3 production wears on. Tesla has either missed or delayed production goals since it started building its newest car late last year.